Amazon shares surge on surprise quarterly profit

Amazon shares have surged almost 15% after it posted an unexpected profit on Thursday. The online retailer reported a $92m profit for the three months to 30 June, surprising investors who had expected another loss. Sales rose by 20% to almost $23.2bn. The results sent shares in Amazon up almost 15% to $553.85, making it worth $222bn. The company's stock has risen by 78% since the start of the year.
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